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On Wednesday 15 September 2004 19:20, Jon Gilchrist wrote:
> I tested every
> ps I could find in my house (probably 20 or more) and *none* of them
> put out the stated voltage. A typical 9v was putting out somewhere
> between 12 and 15.
It is nearly impossible to build a power supply that puts out the rated
voltage when there is no load. Most will put out too high a voltage (like
you have seen), some just shut down.
To meassure the voltage of a PS, shorten it with a 1000 Ohm resistor or
something like that and meassure the voltage at the resistor.
Ulrich
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Message has 1 Reply:
 | | Re: RCX 2.0 Power Supply
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| (...) Not nearly impossible. It just requires a little more intelligence be put into the power supply. All the regulated power supplies my company produces contain a circuit called a down programmer. This circuits job is to discharge the filter (...) (20 years ago, 16-Sep-04, to lugnet.robotics, lugnet.trains)
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Message is in Reply To:
| | Re: RCX 2.0 Power Supply
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| (...) On a marginally related note, does someone out there have the equipment to accurately test the output voltage of some typical dc power supplies like the one used for this external ps? I tested every ps I could find in my house (probably 20 or (...) (20 years ago, 15-Sep-04, to lugnet.robotics, lugnet.trains)
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